Truth telling is not compatible with the defence of the realm.

The technical history of modern harmony is a history of growth of toleration by the human ear of chords that at first sounded discordant and senseless to the main body of contemporary professional musicians.

We are more gullible and superstitious today than we were in the Middle Ages, and an example of modern credulity is the widespread belief that the Earth is round. The average man can advance not a single reason for thinking that the Earth is round. He merely swallows this theory because there is something about it that appeals to the twentieth century mentality.

I don't know what to say about this book. The experience on which it is founded is so extraordinary, that an honest record of it should be preserved . . . But it would have driven me mad; and I am not sure that the author came out of it without a slight derangement.

Once there was a time when all people believed in God and the church ruled. This time is called the Dark Ages. He who can, does. He who cannot teaches.

I have prophesied about the faith of Muhammad that it would be acceptable to the Europe of tomorrow as it is beginning to be acceptable to the Europe of today. ... I believe that if a man like him were to assume the dictatorship of the modern world he would succeed in solving its problems in a way that would bring it the much-needed peace and happiness.

War can so easily be gilt with romance and heroism and solemn national duty and patriotism and the like by persons whose superficial literary and oratorical talent covers an abyss of Godforsaken folly.